関連する実験動画
Updated: Jul 25, 2026
05:41
Purification of Platelets from Mouse Blood
Published on: May 7, 2019
血小板とは 血小板のこと
1Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City 73190, USA. Jim-George@OUHSC.edu
Lancet (London, England)
|May 9, 2000
まとめ
血小板は,血液の凝固と出血の予防に不可欠です. 血小板機能と血小板タンパク質のシグナル伝達を理解することは,出血障害と血栓性疾患の治療の鍵です.
科学分野:
- 血液学 ヘマトロジ
- 細胞生物学 細胞生物学
- バイオケミストリー バイオケミストリー
背景:
- メガカリオサイトから発生する血小板は,血液静止と血栓性疾患に不可欠です.
- トロンボポエチンは,血小板とメガカリオ細胞のc-mpl受容体と結合することによってメガカリオ細胞の発達を調節する.
- 血小板膜のグリコプロテインは,サブエンドセリア組織への粘着と集積を促進し,静止プラグを形成します.
研究 の 目的:
- 血静と血栓性疾患における血小板の役割を明らかにする.
- トロンボポエチンによって調節されるメガカリオサイト発達のメカニズムを理解する.
- 血小板機能調節の治療の可能性を強調する.
主な方法:
- 血小板の生物学と機能に関する既存の文献のレビュー.
- トロンボポエチン信号伝達経路の分析.
- 血小板膜のグリコプロテインが粘着と集積に果たす役割の検討.
主要な成果:
- 血小板は,血静と血栓形成において二重の役割を果たします.
- トロンボポエチン-c-mplの相互作用は,メガカリオサイト発達の中心にある.
- 血小板機能不全または低血小板数は出血につながる.
- 血小板膜のグリコプロテインは,血栓形成に不可欠です.
結論:
- 血小板の機能は,血管の完全性を維持し,過剰な出血を防ぐために重要です.
- トロンボポエチンや血小板機能をターゲットにすることは,心血管や脳血管疾患の治療戦略を提供します.
- 血小板生物学に関するさらなる研究は,出血および凝固障害に対する新しい治療法につながる可能性があります.
関連する概念動画
01:20Fluid Connective Tissues: Blood and Lymph
Blood and lymph are fluid connective tissues. They contain cells, also known as formed elements, circulating in a liquid extracellular matrix, the plasma. The formed elements are derived from hematopoietic stem cells in the bone marrow. Blood and lymph connect all vital parts and carry nutrients, oxygen, and other essential molecules like antibodies.
Blood
The blood flows through blood vessels— arteries, capillaries, and veins. Blood plasma is primarily made of proteins, solutes, and water.
Blood
The blood flows through blood vessels— arteries, capillaries, and veins. Blood plasma is primarily made of proteins, solutes, and water.
01:26Characteristics and Functions of Blood
Blood is specialized connective tissue comprising about 8% of the body mass. It has a thick, liquid extracellular matrix that contains cells, dissolved proteins, and electrolytes, making it five times more viscous than water. Blood is warm, around 38°C, and has an alkaline pH ranging from 7.35 to 7.45.
The primary function of blood is to transport oxygen and carbon dioxide between tissues and the lungs. Oxygenated blood is bright red, while oxygen-depleted blood is darker. It also carries...
The primary function of blood is to transport oxygen and carbon dioxide between tissues and the lungs. Oxygenated blood is bright red, while oxygen-depleted blood is darker. It also carries...
01:22Composition of Blood
The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
Formed elements constitute the remaining 45% of the blood volume. These...
Formed elements constitute the remaining 45% of the blood volume. These...
01:24Composition of Blood Plasma
Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins, binding to...
01:21Structure and Function of Leukocytes
An adult in good health typically has between 4,500 and 11,000 leukocytes, or white blood cells, per microliter of blood, which constitutes about 1% of the total blood volume. Unlike red blood cells, white blood cells contain a nucleus and other cellular organelles but do not have hemoglobin. Most white blood cells reside in connective tissues, particularly in lymphatic organs such as the lymph nodes, with only a small fraction present in circulating blood.
White blood cells protect the body...
White blood cells protect the body...
01:18Structure and Function of Platelets
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...